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JB4shop RACE 4.5" M140i and M240i Decat Downpipe

  • Sale
  • £345.00
  • Regular price £399.00


This is the 4.5"  RACE Decat downpipe for the B58 engine version turbo only.This downpipe is a simple to fit upgrade that gives a great sporty tone to the stock exhaust and allows stage 2 tuning. 

Genuine 4.5" high flow design
Mandrel bent from 304 stainless tube
Reverse purge Argon tig welded for perfect welds
Short flexi pipe for minimal loss of flow
Direct bolt-on fit


Please note: This downpipe is not MOT compliant and may cause the engine management light to illuminate. A JB4 or alternative stage 2 tune is required to code out the fault code for cat efficiency.